US · 12,345.67US customary measurementsRoad distance: miles
United States display preferences. Review the stated population, method and limitations; these are estimates, not a medical diagnosis.
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Your details
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Estimated due date
2026-10-08
United States · calculated from your inputs
Estimated due date2026-10-08
Estimated conception date2026-01-15
Gestational age on as-of date12 weeks 6 days
Days from as-of date to due date190
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How this result was calculated
Due date=LMP+280+(cycle−28) days, conception+266, embryo transfer+266−embryo age, or ultrasound date+280−gestational age.
Country setup: United States. Displayed measurements are converted to the formula's base units internally.
Assumption: Estimated pregnancy calendar. Clinical ultrasound dating can supersede calendar estimates; conception cannot be pinpointed from dates alone. Source: https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2017/05/methods-for-estimating-the-due-date United States display preferences. Review the stated population, method and limitations; these are estimates, not a medical diagnosis.
Calculation version 1.0.0 · Support state: generic
Formula and method
Due date=LMP+280+(cycle−28) days, conception+266, embryo transfer+266−embryo age, or ultrasound date+280−gestational age.
This calculation uses the values you enter. It runs in your browser and does not request a location or account.
Worked example
A 28-day cycle beginning January 1, 2026 gives an estimated due date of October 8, 2026.
Questions people ask
Which method does this tool use?
Due date=LMP+280+(cycle−28) days, conception+266, embryo transfer+266−embryo age, or ultrasound date+280−gestational age.
What should I check before using the result?
Estimated pregnancy calendar. Clinical ultrasound dating can supersede calendar estimates; conception cannot be pinpointed from dates alone. Source: https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2017/05/methods-for-estimating-the-due-date